创建闪电设计（如 The Flash）

Question

我正在尝试重新创建闪电侠（DC 漫画）中的闪电符号（或 生活大爆炸 的谢尔顿库珀穿的 T 恤） CSS.

这将像一个星级评分系统一样，只是一个 'lightning rating system'。

但是，由于我试图将 HTML 保持在最低限度，因此我只想在 CSS 中设置样式。

我已经到了：

html,
body {
  margin: 0;
  height: 100%;
  background: radial-gradient(ellipse at center, rgba(79, 79, 79, 1) 0%, rgba(34, 34, 34, 1) 100%);
}
.wrap {
  height: 50vw;
  width: 50vw;
  position: relative;
  margin: 0 auto;
}
.circ:hover{
  background:gray;
  }
.circ:hover .bolt{
  background:gold;
  }
.circ {
  height: 50%;
  width: 50%;
  background: white;
  border: 5px solid black;
  border-radius: 50%;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  box-shadow:0 0 10px 2px black;
}
.bolt {
  position: absolute;
  top: 5%;
  left: 50%;
  height: 70%;
  width: 30%;
  background: yellow;
  border: 2px solid black;
  border-bottom: none;
  transform: perspective(200px) skewX(-10deg) rotateX(15deg);
}
.bolt:before {
  content: "";
  position: absolute;
  top: 90%;
  left: 20%;
  height: 50%;
  width: 100%;
  background: inherit;
  border: 2px solid black;
  transform:  ;
}
/*
.bolt:after{
  content:"";
  position:absolute;
  top:-40%;left:20%;
  height:50%;
  width:100%;
  background:inherit;
  transform:perspective(50px) skewX(-10deg) rotateX(45deg);
  }*/

<script src="https://cdnjs.cloudflare.com/ajax/libs/prefixfree/1.0.7/prefixfree.min.js"></script>
<div class="wrap">

  <div class="circ">

    <div class="bolt"></div>
  </div>
</div>

但不知道如何从这里继续。

我已经尝试使用 perspective 属性，虽然我认为我还没有完全掌握它 - 主要是因为我有点困惑当它应用于父级时，它对 :before 和 :after 属性做了什么。

我为此选择了 CSS，因为白色背景和螺栓颜色会在点击时改变，因为我知道如何使用 CSS。

(我知道SVG在这里可能是一个更好的选择，但是由于时间限制我没能学会这个，所以我更愿意使用'what I know how to use'，也就是CSS)

Answer 1

我知道你不想要 SVG，但这真的很简单，而且比用 css 制作它要快得多：

截屏你的闪电。
转到：http://www.base64-image.de/ 上传图片（jpg、png、gif）。
获取css背景图片代码

Answer 2

SVG

给你 ~~@Professor.CSS~~。 @jbutler483
A Circle
And Polygon

svg {
  background-color: red;
}

<svg width="100px" height="200px" viewBox="0 0 100 150">
  <circle fill="white" stroke="black" cx="50" cy="75" r="50"></circle>
  <polygon stroke="gray" fill="yellow" points="100,0 67,50 90,45 47,100 70,95 0,150 27,110 12,113 50,70 30,73 100,0" />
</svg>

或css

它只是 ::before 和 ::after 照明元素。 drop-shadow 在照明容器上。

body {
  background-color: red;
}
.container {
  -webkit-filter: drop-shadow(2px 2px 0px gray);
}
.circle {
  display: inline-block;
  border-radius: 50%;
  background-color: white;
  border: 5px solid black;
  border-color: black;
}
.lightning {
  position: relative;
  margin: 50px;
  width: 30px;
  height: 50px;
  transform-origin: 50% 50%;
  transform: skewX(-30deg) skewY(-30deg) rotate(10deg);
  background-color: yellow;
}
.lightning:before {
  position: absolute;
  border-style: solid;
  border-width: 0 0 40px 30px;
  border-color: transparent transparent yellow transparent;
  top: -39px;
  left: -17px;
  content: "";
}
.lightning:after {
  position: absolute;
  border-style: solid;
  border-width: 0 0 40px 30px;
  border-color: transparent transparent transparent yellow;
  bottom: -39px;
  right: -17px;
  content: "";
}

<div class="circle">
  <div class="container">
    <div class="lightning"></div>
  </div>
</div>

Answer 3

设法使用 CSS 倾斜和旋转一些定位来完成此操作。

它不是最干净的，也不适合响应速度或更改大小，但它可以工作，并且在我 space 的短时间内尽可能接近。

代码如下：

#lightning {
  position: relative;
  height: 1000px;
  width: 600px;
  background: red;
}
.above,
.below {
  height: 100%;
  width: 100%;
  position: absolute;
  top: 100px;
}
.above .middle {
  background: yellow;
  position: absolute;
  top: 300px;
  left: 100px;
  height: 125px;
  width: 400px;
  -webkit-transform: rotate(111deg) skew(35deg);
  transform: rotate(111deg) skew(35deg);
}
.above .toptri {
  position: absolute;
  height: 200px;
  width: 0px;
  padding: 0px;
  top: -175px;
  left: 300px;
  -webkit-transform: rotate(0deg) skew(141deg);
  transform: rotate(0deg) skew(141deg);
  border-top: 0px transparent;
  border-left: 50px solid transparent;
  border-right: 128px solid transparent;
  border-bottom: 284px solid #FFFF00;
  -webkit-transform: rotate(350deg) skew(141deg);
  transform: rotate(350deg) skew(141deg);
}
.above .bottri {
  position: absolute;
  height: 200px;
  width: 0px;
  padding: 0px;
  top: 400px;
  left: 125px;
  -webkit-transform: rotate(0deg) skew(141deg);
  transform: rotate(0deg) skew(141deg);
  border-top: 0px transparent;
  border-left: 50px solid transparent;
  border-right: 128px solid transparent;
  border-bottom: 284px solid #FFFF00;
  -webkit-transform: rotate(170deg) skew(141deg);
  transform: rotate(170deg) skew(141deg);
}
.below .middle {
  background: grey;
  position: absolute;
  top: 280px;
  left: 80px;
  height: 165px;
  width: 440px;
  -webkit-transform: rotate(111deg) skew(35deg);
  transform: rotate(111deg) skew(35deg);
}
.below .toptri {
  position: absolute;
  height: 160px;
  width: 0px;
  padding: 0px;
  top: -200px;
  left: 265px;
  -webkit-transform: rotate(0deg) skew(141deg);
  transform: rotate(0deg) skew(141deg);
  border-top: 0px transparent;
  border-left: 80px solid transparent;
  border-right: 158px solid transparent;
  border-bottom: 370px solid grey;
  -webkit-transform: rotate(350deg) skew(141deg);
  transform: rotate(350deg) skew(141deg);
}
.below .bottri {
  position: absolute;
  height: 200px;
  width: 0px;
  padding: 0px;
  top: 400px;
  left: 125px;
  -webkit-transform: rotate(0deg) skew(141deg);
  transform: rotate(0deg) skew(141deg);
  border-top: 0px transparent;
  border-left: 50px solid transparent;
  border-right: 128px solid transparent;
  border-bottom: 284px solid #FFFF00;
  -webkit-transform: rotate(170deg) skew(141deg);
  transform: rotate(170deg) skew(141deg);
}
.below .bottri {
  position: absolute;
  height: 160px;
  width: 0px;
  padding: 0px;
  top: 380px;
  left: 100px;
  -webkit-transform: rotate(0deg) skew(141deg);
  transform: rotate(0deg) skew(141deg);
  border-top: 0px transparent;
  border-left: 80px solid transparent;
  border-right: 158px solid transparent;
  border-bottom: 370px solid grey;
  -webkit-transform: rotate(170deg) skew(141deg);
  transform: rotate(170deg) skew(141deg);
}

<div id="lightning">
  <div class="below">
    <div class="toptri"></div>
    <div class="middle"></div>
    <div class="bottri"></div>
  </div>
  <div class="above">
    <div class="toptri"></div>
    <div class="middle"></div>
    <div class="bottri"></div>
  </div>
</div>

CodePen

Answer 4

CSS

CSS 仅使用 :before 和 :after 伪元素，CSS 三角形和 transform。考虑到 CSS 三角形的使用，因为 borders 不能基于百分比，所以很难使这个特定的解决方案具有响应性。此解决方案使用两个 div 作为闪电的基础及其轮廓。

螺栓按以下方式创建：

螺栓的中间在.boltOuter/.boltInner中指定。它是一个在X和Y轴上倾斜的矩形，使其成为倾斜的菱形
"prongs"是相对于容器.boltOuter/.boltInner

:before

:after

"prongs" 是使用 CSS 个三角形（零 height 和 width 元素与选择性 border 组成的。旋转三角形以获得所需的角度
.boltInner的所有元素都变小并从.boltOuter偏移，以允许.boltOuter充当银色轮廓

body {
    background-color: red;
}
.circle {
    background-color: white;
    border: 5px solid black;
    border-radius: 50%;
    height: 400px;
    left: 100px;
    position: relative;
    top: 200px;
    width: 400px;
}
.boltOuter, .boltInner {
    position: absolute;
}
.boltOuter:before, .boltOuter:after, .boltInner:before, .boltInner:after {
    content: "";
    display: block;
    height: 0;
    position: absolute;
    transform: rotateY(-60deg);
    width: 0;
}
.boltOuter {
    background-color: silver;
    height: 300px;
    left: 140px;
    top: 50px;
    transform: skewX(-10deg) skewY(-20deg);
    width: 110px;
    z-index: 2;
}
.boltOuter:before, .boltOuter:after {
    border: 150px solid transparent;
    z-index: 1;
}
.boltOuter:before {
    border-bottom-color: silver;
    border-right-color: silver;
    left: -150px;
    top: -200px;
}
.boltOuter:after {
    border-left-color: silver;
    border-top-color: silver;
    bottom: -200px;
    right: -150px;
}
.boltInner {
    background-color: gold;
    height: 290px;
    left: 5px;
    top: 5px;
    width: 100px;
    z-index: 4;
}
.boltInner:before, .boltInner:after {
    border: 140px solid transparent;
    z-index: 3;
}
.boltInner:before {
    border-bottom-color: gold;
    border-right-color: gold;
    left: -143px;
    top: -190px;
}
.boltInner:after {
    border-top-color: gold;
    border-left-color: gold;
    bottom: -190px;
    right: -143px;
}

<div class="circle">
    <div class="boltOuter">
        <div class="boltInner"></div>
    </div>
</div>

JS Fiddle: https://jsfiddle.net/o7gm6dsb/

Answer 5

Disclaimer: Use SVG for complex images. We can still have some fun with CSS, though, just use this for learning and not production implementation.

单个 HTML 元素是否可行？

是啊！ ...有限制——主要是螺栓上没有边框...但是，嘿，最小 HTML!

顶部和底部部分是使用 :before 和 :after

transparent border triangle trick

中间的螺栓是用 :before

box-shadow

非常粗糙的例子

注意：这个例子使用了一个<div>，因为它需要伪元素子元素。

body {
  background: #F00;
}
div {
  height: 300px;
  width: 300px;
  background: #FFF;
  border-radius: 50%;
  border: solid 5px #000;
  margin-top: 200px;
  position: relative;
}
div:before,
div:after {
  content: '';
  position: absolute;
  transform: skewY(-30deg) rotate(20deg);
}
div:before {
  border-right: solid 70px yellow;
  border-top: solid 160px transparent;
  box-shadow: 50px 100px yellow;
  left: 50%;
  margin-left: -50px;
  top: -70px;
}
div:after {
  border-right: solid 70px transparent;
  border-top: solid 160px yellow;
  bottom: -30px;
  left: 100px;
}

<div></div>

Answer 6

Disclaimer: I recommend SVG for these but that doesn't mean we shouldn't be having fun with CSS. Use this for learning but not production implementation.

这是一种仅使用单个元素（+ 几个伪元素）和一些背景来实现形状的方法 linear-gradients。形状可以无任何扭曲地缩放。

关于如何实现形状的解释：

带有黑色边框的白色圆圈是在伪元素 (:after) 上使用 border-radius 创建的普通 CSS 圆圈。
添加了另一个伪元素 (:before)，它沿 X 轴和 Y 轴倾斜，使螺栓的部分呈现倾斜的外观。
螺栓实际上是通过将多个 linear-gradients 堆叠在一起制成的。它涉及6张渐变图像，其中3张用于螺栓内部的黄色部分，另外3张用于灰色边框。
背景图片（渐变）的大小由闪电的大小决定，每张图片的位置都会产生闪电般的外观。
螺栓的中心部分实际上只有一种纯色，但仍然使用渐变生成，因为我们无法控制纯色背景的大小。

^{注意：如果使用 transform: scale(...) 而不是 height/width 更改 + 转换，则缩放效果很好。}

.lightning {
  position: relative;
  height: 200px;
  width: 200px;
  border-radius: 50%;
  margin: 50px auto;
}
.lightning:after,
.lightning:before {
  position: absolute;
  content: '';
  height: 100%;
  width: 100%;
  top: 0%;
  left: 0%;
}
.lightning:after {
  background: white;
  border: 2px solid;
  border-radius: 50%;
  z-index: -1;
}
.lightning:before {
  background: linear-gradient(transparent 0%, yellow 0%), linear-gradient(to top left, yellow 43%, gray 43%, gray 44%, transparent 44%), linear-gradient(to top left, transparent 56%, gray 56%, gray 57%, yellow 57%), linear-gradient(transparent 0%, gray 0%), linear-gradient(to top left, gray 51%, transparent 51%), linear-gradient(to top left, transparent 49%, gray 49%);
  background-size: 20% 40%, 22% 42%, 22% 42%, 23% 42%, 23% 42%, 23% 42%;
  background-position: 50% 50%, 32% 5%, 70% 100%, 50% 50%, 33% 7%, 69% 98%;
  background-repeat: no-repeat;
  backface-visibility: hidden;
  transform: skewY(-30deg) skewX(-30deg);
  z-index: 2;
}

/* Just for demo */

body {
  background-image: radial-gradient(circle, #3F9CBA 0%, #153346 100%);
}
.lightning {
  transition: all 1s;
}
.lightning:hover {
  transform: scale(1.5);
}

<!-- Script used only for avoidance of prefixes -->
<script src="https://cdnjs.cloudflare.com/ajax/libs/prefixfree/1.0.7/prefixfree.min.js"></script>

<div class="lightning"></div>

螺栓动画：

.lightning {
  position: relative;
  height: 200px;
  width: 200px;
  border-radius: 50%;
  margin: 50px auto;
}
.lightning:after, .lightning:before {
  position: absolute;
  content: '';
  height: 100%;
  width: 100%;
  top: 0%;
  left: 0%;
}
.lightning:after {
  background: white;
  border: 2px solid;
  border-radius: 50%;
  z-index: -1;
}
.lightning:before {
  background: linear-gradient(transparent 0%, yellow 0%), linear-gradient(to top left, yellow 43%, gray 43%, gray 44%, transparent 44%), linear-gradient(to top left, transparent 56%, gray 56%, gray 57%, yellow 57%), linear-gradient(transparent 0%, gray 0%), linear-gradient(to top left, gray 51%, transparent 51%), linear-gradient(to top left, transparent 49%, gray 49%);
  background-size: 20% 40%, 22% 42%, 22% 42%, 23% 42%, 23% 42%, 23% 42%;
  background-position: 50% 50%, 32% 5%, 70% 100%, 50% 50%, 33% 7%, 69% 98%;
  background-repeat: no-repeat;
  backface-visibility: hidden;
  transform: skewY(-30deg) skewX(-30deg);
  z-index: 2;
}

/* Just for demo */

body {
  background-image: radial-gradient(circle, #3F9CBA 0%, #153346 100%);
}
.lightning {
  transition: all 1s;
}
.lightning:hover:before {
  animation: boltstrike 1s;
}
@-webkit-keyframes boltstrike {
  25% {
    transform: translateX(-5%) translateY(5%) skewY(-30deg) skewX(-30deg);
  }
  50% {
    transform: translateX(7.5%) translateY(-7.5%) skewY(-30deg) skewX(-30deg);
  }
  100% {
    transform: skewY(-30deg) skewX(-30deg);
  }
}
@keyframes boltstrike {
  25% {
    transform: translateX(-5%) translateY(5%) skewY(-30deg) skewX(-30deg);
  }
  50% {
    transform: translateX(5%) translateY(-5%) skewY(-30deg) skewX(-30deg);
  }
  100% {
    transform: skewY(-30deg) skewX(-30deg);
  }
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/prefixfree/1.0.7/prefixfree.min.js"></script>

<div class="lightning"></div>

Click here 完整演示，包括动画、点击时的颜色变化等。

旧版本无边框:

.lightning {
  position: relative;
  height: 200px;
  width: 200px;
  border-radius: 50%;
}
.lightning:after,
.lightning:before {
  position: absolute;
  content: '';
  height: 100%;
  width: 100%;
  top: 0%;
  left: 0%;
}
.lightning:after {
  background: white;
  border: 2px solid;
  border-radius: 50%;
  z-index: -1;
}
.lightning:before {
  background: linear-gradient(transparent 0%, yellow 0%), linear-gradient(to top left, yellow 50%, transparent 50%), linear-gradient(to top left, transparent 50%, yellow 50%);
  background-size: 20% 40%, 20% 40%, 20% 40%;
  background-position: 50% 50%, 30% 5%, 70% 100%;
  background-repeat: no-repeat;
  backface-visibility: hidden;
  transform: skewY(-30deg) skewX(-30deg);
  z-index: 2;
}

/* Just for demo */

body {
  background-image: radial-gradient(circle, #3F9CBA 0%, #153346 100%);
}
.lightning {
  transition: all 1s;
}
.lightning:hover {
  height: 250px;
  width: 250px;
}

<!-- Script used only for avoidance of prefixes -->
<script src="https://cdnjs.cloudflare.com/ajax/libs/prefixfree/1.0.7/prefixfree.min.js"></script>

<div class="lightning"></div>

Answer 7

一种不同的CSS方法，可以通过单个div获得结果。

此方法使用通过 http://fontello.com/ 生成的自定义图标字体，这样做的好处是字体可缩放，几乎不需要任何工作或代码。

使用 @font-face 包含字体。在此示例中，字体直接嵌入到 CSS 文件
.bolt是用border-radius: 50%;
:before 伪元素用于螺栓，相对于 .bolt 定位并居中以允许它超出圆边界
在较新的 webkit 浏览器中 -webkit-text-stroke: 3px silver; 可用于为螺栓提供轮廓
如果 -webkit-text-stroke 不受支持 text-shadow 可以用来提供临时边框

@font-face {
  font-family: 'fontello';
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format('truetype');
}
body {
  background-color: red;
}
.bolt {
  background-color: white;
  border: 5px solid black;
  border-radius: 50%;
  height: 100px;
  margin: 50px;
  position: relative;
  text-align: center;
  width: 100px;
}
.bolt:before {
  -webkit-text-stroke: 3px silver;
  color: gold;
  content: '\e800';
  display: block;
  font-family: "fontello";
  font-size: 200px;
  line-height: 100px;
  position: absolute;
  text-shadow: 2px 0 0 silver, -2px 0 0 silver, 0 2px 0 silver, 0 -2px 0 silver, 1px 1px silver, -1px -1px 0 silver, 1px -1px 0 silver, -1px 1px 0 silver;
  width: 100%;
}

<div class="bolt"></div>

Answer 8

您可以使用 html symbols 实现稍微不同的闪电。请注意，并非所有浏览器都支持所有这些。

这是一个简单的例子，你可以用 css/html.

.circle {
 border-radius: 50%;
    border: 4px solid black;
 width: 100px;
 height: 100px;
    font-size: 70px;
    text-align: center;
    display: table-cell;
    vertical-align: middle;
    background: white;
}

.square{
    border: 4px solid red;
    width: 106px;
    height: 106px;
    background: red;
}

<div class="square">
    <div class="circle">⚡</div>
</div>

这个的优点是这个简单，不需要什么。缺点是螺栓略有不同，并非所有浏览器都支持该符号。

如果您需要精确的图片，请在 SVG 中生成它并添加为 svg 或字体。

遗憾的是，在 windows 上看不到标志，但在 macOS (chrome) 上看起来是这样的：

在 ubuntu 上它也可见，但看起来不同。

Answer 9

我建议使用神奇的Drawsvg网站，让您可以释放您的想象力，自由绘制您的 SVG 对象，无需任何先决条件或技能。

完成绘图后，只需单击保存按钮即可获得 SVG 代码，即上图中示例的代码：

<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="100px" height="200px" viewBox="0 0 100 200" preserveAspectRatio="xMidYMid meet" >
    <rect id="svgEditorBackground" x="0" y="0" width="100" height="200" style="stroke: none;" fill="red"/>
    <circle id="e1_circle" cx="50.9398" cy="93.985" stroke="black" style="stroke-width: 1px; vector-effect: non-scaling-stroke;" r="48.5487" fill="white" transform="matrix(1 0 0 1 -1.12782 4.13534)"/><g id="e4_group" fill="yellow" style=""/>
    <polyline stroke="black" id="e5_polyline" style="stroke-width: 1px; vector-effect: non-scaling-stroke;" points="67.1053 21.8045 33.6466 74.812 50.188 69.5489 25 114.286 45.6767 106.767 14.8496 158.271 70.8647 92.8571 45.3008 97.7444 69.3609 56.391 50.188 62.0301 66.7293 21.8045" fill="yellow"/>
</svg>

希望对您有所帮助。

创建闪电设计（如 The Flash）

Create a lightning bolt design (like The Flash)

html

css

svg

css-shapes

SVG

或css

单个 HTML 元素是否可行？

是啊！ ...有限制——主要是螺栓上没有边框...但是，嘿，最小 HTML!

非常粗糙的例子